/**
 * Copyright (c) 2011, Todd Ginsberg
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * Neither the name of Todd Ginsberg, or Gowalla nor the
 *      names of any contributors may be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 *  Also, please use this for Good and not Evil.  
 */
package com.ginsberg.gowalla.request.translate;

import java.lang.reflect.Type;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.SimpleTimeZone;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;

/**
 *
 * @author Ryan Crutchfield - rc6750@gmail.com
 * @author Todd Ginsberg
 */
class DateDeserializer implements JsonDeserializer<Date> {
	// Damn you to heck, SimpleDateFormat. 
	public Date deserialize(JsonElement arg0, Type arg1, JsonDeserializationContext arg2) throws JsonParseException {
		String date = arg0.getAsString();
		date = date.replaceAll("/", "-");
		date = date.replaceFirst("\\s", "T");
		date = date.replaceFirst("\\+00:00", "Z");
		date = date.replaceAll(" ", "");
		date = date.replaceAll("\\+", "GMT\\+");
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
		Calendar cal = Calendar.getInstance(new SimpleTimeZone(0, "GMT"));
	    df.setCalendar(cal);
		try {
			return df.parse(date);
		} catch (ParseException e) {
			throw new JsonParseException("Cannot parse date: " + e.getMessage(), e);
		}
	}
}
